Method for making radiator cores



Nov. 30, 1926. 1,608,735

L. A. HAAS ET AL METHOD FOR MAKING RADIATOR CORES Filed F'eb. 24, 1925 2 Sheets-Sheet l.

Fig j Nov. 30 1926. 1,608,735

L. A. HAAS ET AL METHOD FOR MAKING RADIATOR CORES Filed Feb. 24 1925 2 Sheets-Sheet 2 Patented Nov. 30, 1926.

UNITED STATES lPa'lia-Nfr OFFICE.

LOUIS ANDREW HAAS AND WILLIAM JOHN HAAS, OF ST. PAUL, MINNESOTA.

METHOD FOR MAKING RADIATOR CORES.

Application led February 24, 1925-. Serial No. 11,108.

. and iii" workmanlike manner at mmimum labor, material and equipment costs.

In the drawings, Fig. 1 represents, in dotted and solid lines, a segmental form ot' radin ator core of the type adapted for construc- 5 tion under our improved method, the illustration in solid lines beino limited to avoid unnecessary duplication o? lines in the disclosure; Fig. 2 is a fragmentary elevational view of a cartridge or tube assembly before it is bent into segmental form in the process of com leting the structure shown in Fig. 1; Fig. 3 1s a perspective illustration of a portion of the structure shown in Fig. 2 and .Fig 4 is an elevational view of a tube or cartridge assembly showing the same shaped segmentally over a curved form. l

Referring to Fig. 1 of drawings, it will be seen that the illustrated radiator core is annular in form and comprises an assemblage of cartridgesor tubes 10 disposed radially of the axis of the tube assembly. The tubes 10 are identical, each end of each tube being expanded to form an hexagonal head 10a and said tubes are disposed in rows diagonally of the axis of thestructure. The inner heads 10a of the tubes 10 are soldered together face to face, as shown at the lower part of Fig. l, the inner concave Wall 0f the structure, formed by said inner heads, being scaled in the soldering process. The diagonal rows of tubes 10 are spread apart yat the outer ends of said tubes, the adjacent faces of the heads 10l1 in each row contacting one with the other. Spacing keeper strips '11 having zigzag form are inserted between the outer heads 10a of the rows of tubes `10 and conform with the non-contacting faces of said heads 10a, said strips being soldered to said faces to join the outer ends of 'the tubes 10 and to seal the convex wall formed by the outer heads 10* and strips 11. Segmente] wall plates 12. disposed against opposite vfaces of the tube assembly, are soldered at spacing keepers 11.

their margins to the heads 10'* of the outer- 1 In forming the annular core, We assemble a multiplicity of the tubes 10 and hold the same together with the heads 10n thereof disposed face to face as secu 1n Fig. 3. Taking the tube assembly, thus provided, we dip one side thereof in a bath of solder substantially to the depth ot the heads l()n at that side and thereby not only join the tubes 10 together, but seal the wall of the tube assembly formed by said heads. Choosing a convex Jform ot' the desired radius as at 1?), Fig. 4, the treated side of the tube assembly is. applied thereto, said assembly being bent over the form and given an annular shape, as seen in Fig. 4, wherein the tubes l0 take positions radially of the axis of the form, said tubes l0 spreading apart at their upper ends, row from row, as seen in Figs. 1 and 4. The spacing keeper strips 11, are then inserted between the diagonal rows of tubes and the convex Wall of the tube assembly dipped in a bath of solder substantially to the depth of the outer heads 10a. Said last step not only secures the outer heads 101 ot the tubes 10 to each other and to said strips 11, but seals the convex wall of the structure formed by said outer heads l()EL and strips 11.

It will be seen that the joinder/of the inner heads 10at of the tubes 10 and the sealing of the inner concave wall. would not be possible in a simple dipping process were it not for the fact that the dipping of said ends 'heads 10* of the tubes 10 at the sides of the assembly.

It will be understood that in the instant method, we contemplate the application of wall plates to the ends of a segmental struc ture in lieu of wall plates at the sides thereof and, further, that the method may be employed to form Aring-like and cylindrical tube assemblies. A

Having described our invention, what we claim as new and desire to protect by Letters Patent is:

1. The method of forming an annular Ll f) radiator core consisting in first assembling a plurality of similar tubes with the ends thereof co-planar at either side of the assembly` thendipping one side of the tube assembly to seal together the ends of' the tubes at that side thereof, then bending said treated side of the assembly over a convex form and then dipping the other side of the tube assembly, convexed in said bending process, to seal together the ends of the tubes at said latter side of said assembly.

`2. The method of Vforming an annular ra-k Idiator core consisting in first grouping a plurality of similar ltubes with the ends coplanar at either side of the assembly, then dipping one side of the assembly to seal the ends of the tubes together at said dipped side, then bending the assembly over a convex form with said treated side next to said form, then inserting spacing keepers between the free ends of said tubes separated in the bending process, and then dipping the eonvexed side of the assembly to join said tubes and keepers and to seal that side of said assembly.

'3. The method ot' forming an annular radiator core consisting in first grouping a plurality of tubes with the ends thereof coplanar at either side of the assembly, the arrangement of said tubes being effected to dispose the same in diagonal rows, then ydipping one side of the assembly in a soldering fluid to join the ends of the tubes and to seal said dipped side, then bending the assembly over a convex surface With said treated side next thereto to give annular form to the assembly, then inserting spacer keepers between the rows of tubes, diagonally separated in the bending process, and then dipping the convexed, keeper equipped side of the assembly in a soldering fluid to joinl the tubes and keepers and to seal said side of the assembly.

4. The method of forming an annular radiator core consisting in first grouping a plurality of similar, heXagona-lly headed tubes with the heads co-planar at either side of the assembly, then dipping one side 0f the assembly in a bath of solder substantially to the depth of said heads to seal the .same together, then bending the assembly over a form With said dipped side next thereto, then inserting spacing keeper strips between the rows of outer heads, and then dipping the convexed side of the assembly in a bath of solder, substantially to the depth of the outer heads, to seal said heads and strips together.

5. The method of forming au annular radiator core consisting in first assembling a plurality of similar tubes with the. ends thereof co-planar at either side of the assembly, then dipping one side ofthe tube assembly to seal together the ends of the tubes at that side thereof, then bending said treate'd'side of the assembly over a convex form, then dipping the convexed side of the tube assembly to seal together the ends of the tubes at said latter side and then applying wall plates to the tubes at other faces of the tube assembly.

6. The method of forming an annular radiator core consistingin first grouping a plurality of similar tubes with the ends coplanar at either side of the assembly, then dipping one side of the assembly to seal the ends of the tubes together at said dipped side, then bending the assembly over a con` veX form with said treated side next to said form, then inserting spacing keepers between theI free ends of said tubes separated in the bending process, then 'dipping the convexedside of the assembly to join said tubes and keepers and to seal that side of said assembly and then soldering plates to the tubes and spacing keepers at other faces of the tube, assembly. p

In testimony whereof, We have signed our names to this specification.

LoUrs ANDREW Haas. WILLIAM JOHN Haas. 

